What makes a team a consistent winner?

this is a discussion within the Saints Community Forum; It's not a whole lot to talk about, so I thought I'd look back at the past 5 seasons and see what teams have the most conistent winning seasons.
I wanted to look and see if any of these teams ...

It's not a whole lot to talk about, so I thought I'd look back at the past 5 seasons and see what teams have the most conistent winning seasons.

I wanted to look and see if any of these teams had something in common. Whether that be coaching, franchise QB's, etc., ect..

A couple of observations I made is that when a teams starting QB gets injured, it usually affects how their season goes:

Example:
-Jets go from 9-7 to 6-10 when Pennington gets injured in 2003.
-Rams go from 14-2 to 7-9 when Warner is injured in 2002.
-Giants go from 10-6 to 4-12 when Collins is injured in 2003.
- Falcons go from 9-6 to 5-11 when Vick is injured in 2003.

The next thing I noticed is that almost all of the top teams over the last 5-years had a franschise QB. Example: